Release Crash in Android

Ehsan_Nikaeen1 · May 6, 2022, 9:45pm

My RELEASED version of the app crashes when initialize with Backendless and without initializing works fine. I don’t use proguard.

This is Google play crash report:

ATAL EXCEPTION: main
Process: com.foroodja.retailers, PID: 18830
java.lang.ExceptionInInitializerError
	at b.a.e0.m(Unknown Source:0)
	at b.a.e.<clinit>(Unknown Source:15)
	at b.a.e.r(Unknown Source:0)
	at b.a.i0.b.a.f(Unknown Source:8)
	at b.a.i0.b.a.M(Unknown Source:86)
	at d.a.c.a.j$a.a(Unknown Source:17)
	at io.flutter.embedding.engine.f.b.e(Unknown Source:49)
	at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(Unknown Source:4)
	at android.os.MessageQueue.nativePollOnce(Native Method)
	at android.os.MessageQueue.next(MessageQueue.java:326)
	at android.os.Looper.loop(Looper.java:160)
	at android.app.ActivityThread.main(ActivityThread.java:6718)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'e.k.e e.d.f.g()' on a null object reference
	at e.k.e.i(Unknown Source:4)
	at b.a.e0.<init>(Unknown Source:7)
	at b.a.e0.<clinit>(Unknown Source:16)

Ehsan_Nikaeen1 · May 7, 2022, 8:19am

I moved the initialization to different pages. On any page, the app wants to initialize it crashes.
I updated the flutter, any packages in my project, and Backendless to 7.2.3. And also tried any solution on the internet I could find.

Ehsan_Nikaeen1 · May 7, 2022, 8:57am

I even made a balnc project with flutter just put backendless package and initialize it, then build apk and it crashes. Removed the initialization works.

Nikita_Fedorishchev · May 9, 2022, 6:54am

Hello, @Ehsan_Nikaeen1.

Try to call initApp first, and only after that setUrl.

Best Regards, Nikita.

Ehsan_Nikaeen1 · May 9, 2022, 8:43am

I did even better, I didn’t call setUrl. and it crashes again!

Nikita_Fedorishchev · May 9, 2022, 8:59am

One moment. I will check

Nikita_Fedorishchev · May 9, 2022, 9:10am

@Ehsan_Nikaeen1, I don’t have any problems.
You need to call setUrl if your app is on EU server. It just needs to be done after initApp.
Debug version is work as expected for you?
What version of backnedless_sdk are you using?

Ehsan_Nikaeen1 · May 9, 2022, 9:18am

Yes, I was working fine all way and when I published it to google play I realized it crashes. It wasted two weeks of my time now, I delete every package from the app until getting to backendless. I use 7.2.3 version.

Ehsan_Nikaeen1 · May 9, 2022, 9:24am

No difference!

Screenshot 2022-05-09 102400

Ehsan_Nikaeen1 · May 9, 2022, 9:31am

No difference:

 void initBackend() async {

    await Backendless.initApp(
        applicationId: Constants.APPLICATION_ID,
        androidApiKey: Constants.ANDROID_API_KEY,
        iosApiKey: Constants.IOS_API_KEY);
if ((await Backendless.isInitialized())!) {
  Backendless.setUrl("https://eu-api.backendless.com");
    }

  }

Nikita_Fedorishchev · May 9, 2022, 9:35am

I can assume that something is wrong with the gradle, manifest or proguard settings.
Right now we have a BackendlessViewer app on the public google play and appstore that uses the backendless_sdk. Here is it build.gradle settings:

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('app/key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '6'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.2.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 31

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
        checkReleaseBuilds false //<- add this line
    }

    defaultConfig {
        applicationId "com.backendless.backendlessViewer"
        minSdkVersion 23
        targetSdkVersion 31
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        multiDexEnabled = true
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
    }

    buildTypes {
        release {
            signingConfig signingConfigs.release

            minifyEnabled true
            multiDexEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:multidex:1.0.3'
    implementation 'com.google.firebase:firebase-core:20.0.0'
}

Try redesigning your gradle to match the above as closely as possible.

Ehsan_Nikaeen1 · May 9, 2022, 9:38am

My gradle file is like this: Standard one didn’t change anything.

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

android {
    compileSdkVersion 30

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.foroodja.retailers"
        minSdkVersion 20
        targetSdkVersion 30
        multiDexEnabled = true
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }

}
dependencies {
    implementation("androidx.multidex:multidex:2.0.1")
}

flutter {
    source '../..'
}

Nikita_Fedorishchev · May 9, 2022, 9:40am

        signingConfig signingConfigs.release            
        minifyEnabled true
        multiDexEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

add this to

     buildTypes{
         release{
       
     }
}

Ehsan_Nikaeen1 · May 9, 2022, 9:43am

Do I need to edit “proguard-android.txt”?

Nikita_Fedorishchev · May 9, 2022, 9:44am

nope

Nikita_Fedorishchev · May 9, 2022, 9:46am

also I don’t see proguard-rules.pro file in your
android -> app folder.

Ehsan_Nikaeen1 · May 9, 2022, 9:46am

Not working.
I saw something in your previous tickets about editing proguard, Are you sure?

Screenshot 2022-05-09 104528

Nikita_Fedorishchev · May 9, 2022, 9:47am

proguard-rules.pro should look like this:

#Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }
#Backendless
-dontwarn com.backendless.**
-dontwarn weborb.**
-keep class weborb.** {*;}
-keep class com.backendless.** {*;}

Nikita_Fedorishchev · May 9, 2022, 9:49am

You don’t need add proguard-android.txt to project. But need proguard-rules.pro here:

Ehsan_Nikaeen1 · May 9, 2022, 9:54am

Thank you very much. It is working now.
Please add this to your documents.